Megabolt is a cross-platform download manager. It aims for all the features of current download managers, such as segmented downloads, pause/resume support, support for a large number of protocols, etc.

Xtreme Download Manager is a advanced and powerful tool to increase download speed up to 500%, resume broken/dead downloads, capture FLV videos from any site, and schedule downloads. It uses a sophisticated dynamic segmentation algorithm, data compression, and connection reuse to speed up the download process. It supports HTTP, HTTPS, and FTP protocols, firewalls, proxy servers, file redirects, cookies, authorization, etc. It seamlessly integrates with Firefox on any operating system. It also integrates with any other browser to handle downloads automatically using advanced browser integration. It is entirely written in Java, so it runs on any operating system without even being installed.

ItSucks is a Web spider with the ability to
download (and resume) files. It is also highly
customizable with regular expressions and download
templates. All backend functionality is also available
in a separate library.

rsget.pl is an application designed to retrieve files from download services (like RapidShare, MegaUpload, and many more). It has a long list of features already implemented, and an even longer TODO list.

myfiles is a Web application that serves as a way to automatically display and allow downloads (or authorized uploads) of files to any selected directory. It can keep counts and optionally record basic information regarding clients who download files. There are some global configuration controls and authorized rights for users who successfully login.